Maybe it’s time to cast your gaze over to @slashdotdash’s work like Building a CQRS/ES web application in Elixir using Phoenix.
peerreynders
andre1sk
I think having a focused book that covers deployments well would be a very welcome addition to the Elixir books collection.
4
AstonJ
Personally I would love to see more books echo the sentiment of PragDave in his online course - specifically, utilising the Replaceable Component Architecture as I’m really drawn to this way of building systems.
I’d like to see an app built with multiple components using different DBs (where those DBs excel - a r/ships component with a graph DB for example, a registrations component with Postgres perhaps).
I think as apps get bigger (they’re only going to get bigger and more complex) more and more teams are going to look to architectures and principles that are better equipped to deal with these challenges as well as which languages make them easy.
I often think about the Rails monolith and how far that is from how Elixir and Phoenix encourages you to build systems - Umbrellas, Contexts and more recently via people like PragDave, the replaceable component architecture (although he just calls it components).
7
ibarch
chriseyre
frigidcode
exmanga
Please no more chat applications or games 
I also think there are more than enough books and courses for beginners, what I want to see is a book or a course building REAL WORLD projects from start to finish.
6
jordiee
I would like a book on all the information that was not readily available at the time I was building my last application. Things like deployment with ci integration, how to connect nodes on application start, fault tolerance across nodes, more in depth look at mnesia(although I switched away from it because I was having issues with dynamic node membership), distributed topics like how to handle split brain ect. Basically like others have stated. A book that goes beyond the basics would be an instant buy for me.
5
frigidcode
CptnKirk
I’d like to see a book on bridging the Elixir ↔ native divide.
Hardly anyone produces an Elixir language wrapper for their C++ lib. Forcing people to use a different language, go without, or try and brave NIFs alone. I’d love a book that would walk me through how to approach this problem. You’d probably make extra money with add-on video lectures or a support forum.
If you need a popular but complex starting point, you can use:
- Dlib - C++
- FFmpeg - C
- ImageMagick - C
7